🕵️ Masimo Corp ($MASI)
SEC insider & ownership activity, last 12 months · CIK 937556 · every row links its SEC filing
Over the last 12 months insiders sold $2.6M against $468K of open-market buying. Sampath Anand sold $2.6M in discretionary trades (Jan). Joe Kiani trimmed 10.3% → 6.5%. One red-flag 8-K in the window: Delisting notice (3.01), Jun 10, 2026.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
2 buyers, $468K (3 lots) · 1 seller, $2.6M (3 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Sampath Anand | 0 | – | 3 | $2.6M | Jan 28, 2026 |
| William R. Jellison | 1 | $438K | 0 | – | Aug 11, 2025 |
| Brennan Michelle | 2 | $31K | 0 | – | Aug 13, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Blackrock, Inc. | 7.9% | 13G | Feb 7, 2025 | filing ↗ | |
| Joe Kiani | 6.5% | 13G | May 14, 2026 | filing ↗ | |
| Pentwater Capital Management LP | 6.1% | 13G | May 15, 2026 | filing ↗ | |
| Matthew Halbower | 6.1% | 13G | May 15, 2026 | filing ↗ | |
| Barclays PLC | 5.5% | 13G | May 14, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Sampath Anand | $2.6M | Jan 28, 2026 | filing ↗ |
| Tripodi Blair | $2.4M | Dec 11, 2025 | filing ↗ |
| Ahmed Omar | $461K | Nov 28, 2025 | filing ↗ |
| Muhsin Bilal | $3.6M | Sep 29, 2025 | filing ↗ |
| Muhsin Bilal | $7.1M | Sep 26, 2025 | filing ↗ |
| Muhsin Bilal | $3.5M | Sep 23, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Agreement terminated (1.02) | Jun 10, 2026 | filing ↗ |
| Acquisition or disposition (2.01) | Jun 10, 2026 | filing ↗ |
| Delisting notice (3.01) | Jun 10, 2026 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Jun 10, 2026 | filing ↗ |
| Change of control (5.01) | Jun 10, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jun 10, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Jun 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 10, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 1, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 1, 2026 | filing ↗ |
| Other events (8.01) | Apr 23, 2026 | filing ↗ |
| Material agreement (1.01) | Feb 16, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 16, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 16, 2026 | filing ↗ |
| Earnings (2.02) | Jan 12, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 12, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 3, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 3, 2025 | filing ↗ |
| Material agreement (1.01) | Dec 1, 2025 | filing ↗ |
| Agreement terminated (1.02) | Dec 1, 2025 | filing ↗ |
| New financial obligation (2.03) | Dec 1, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 1, 2025 | filing ↗ |
| Earnings (2.02) | Nov 4, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 23, 2025 | filing ↗ |
| Acquisition or disposition (2.01) | Sep 23, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 23, 2025 | filing ↗ |